edit:
correction; I deleted everything and tried it again and it worked, dunno what the problem was.

Thanks for the fast respons.
Ok, I mean that was the first step of the tutorial and i dind´t skip it, but you are correct by testing “javac -version” I found out it isn´t installed. I think I have done something wrong with the “JAVA_HOME” variables.

In the example he is downloading “jdk-8.u65-…” and set the variable to “C:\Program Files\Java\jdk1.8.0_65”, the newer version is “jdk-8.u131” so the correct direction would be “C:\Program Files\Java\jdk1.8.0_131” ?

If this is correct than maybe the information at the beginning of the tutorial is wrong, “We’ll pick x64 Java Developement Kit (JDK). JDK automatically installs Java Runtime Environment (JRE).” ?